How long must a powder coated part stay at temperature?

Whatever the TDS line for your setpoint says, commonly 10 to 20 minutes at metal temperature. The example plans a 15-minute hold as 16.5 with a 10% allowance, plus 11 minutes of heat-up.

What does the heating rate do on this page?

It converts the metal rise into the heat-up minutes that precede the hold: 330 °F at 30 °F per minute is 11 minutes before the at-temperature clock starts.

When does time at temperature start counting?

When the governing section's metal reaches cure temperature, verified by a probe on the part, not when the door closes or the air recovers. Everything before that is heat-up.

How much safety allowance should the hold carry?

Enough to cover load variation and probe placement, and never enough to leave the TDS window. Ten percent is a common start; the schedule's stated maximum is the ceiling.

Finishing calculator

Time at Temperature Calculator: The Hold, Planned Honestly

Plan the segment that does the chemistry. Enter the TDS hold, the metal rise, the datalogged heating rate and a safety allowance; the page returns the planned hold and the total oven dwell.

What this calculator does

Plan the metal's time at cure temperature with a stated allowance, heat-up included.

Formula used

Planned time at temperature = required hold × (1 + safety allowance)
Heat-up before the hold = metal rise ÷ achieved heating rate
Total oven dwell demanded = planned hold + heat-up
Minutes added by the allowance = planned hold − required hold

Inputs explained

Required Time at Metal Temperature: The TDS hold once the metal reaches cure temperature.
Metal Temperature Rise Required: Cure temperature minus the parts' starting temperature.
Achieved Metal Heating Rate: Datalogged rate the governing section's metal climbs at.
Cure Safety Allowance: Margin on the hold for load variation and probe confidence.

How to use the result

Best suited to producing the total dwell requirement, setting a batch oven's timer with margin, checking whether heat-up outgrew the dwell.
A hold plan is not a cure verification; solvent rub or a datalogger confirms it. The linear heat-up estimate flattens near temperature. Infrared and hybrid ovens change the rate mid-climb; use the whole trace.

Current U.S. benchmarks

Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
The producer price index for industrial chemicals stands at 336.006 (BLS, Aug 2026), up 13.3% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

How long must a powder coated part stay at temperature? Whatever the TDS line for your setpoint says, commonly 10 to 20 minutes at metal temperature. The example plans a 15-minute hold as 16.5 with a 10% allowance, plus 11 minutes of heat-up.
What does the heating rate do on this page? It converts the metal rise into the heat-up minutes that precede the hold: 330 °F at 30 °F per minute is 11 minutes before the at-temperature clock starts.
When does time at temperature start counting? When the governing section's metal reaches cure temperature, verified by a probe on the part, not when the door closes or the air recovers. Everything before that is heat-up.
How much safety allowance should the hold carry? Enough to cover load variation and probe placement, and never enough to leave the TDS window. Ten percent is a common start; the schedule's stated maximum is the ceiling.

Last reviewed 2026-10-01.